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year | consumption | change |
1980 | 2.03 | NA |
1981 | 2.00 | -1.65% |
1982 | 1.84 | -8.04% |
1983 | 1.77 | -3.65% |
1984 | 1.87 | 5.81% |
1985 | 1.87 | 0.01% |
1986 | 1.82 | -2.98% |
1987 | 1.87 | 2.66% |
1988 | 1.86 | -0.14% |
1989 | 1.95 | 4.62% |
1990 | 1.97 | 1.13% |
1991 | 2.04 | 3.35% |
1992 | 1.99 | -2.35% |
1993 | 2.03 | 2.16% |
1994 | 2.15 | 5.75% |
1995 | 2.26 | 5.27% |
1996 | 2.33 | 2.87% |
1997 | 2.48 | 6.53% |
1998 | 2.54 | 2.30% |
1999 | 2.73 | 7.52% |
2000 | 2.73 | 0.08% |
2001 | 2.93 | 7.28% |
2002 | 2.98 | 1.77% |
2003 | 3.15 | 5.61% |
2004 | 3.32 | 5.37% |
2005 | 3.35 | 0.81% |
2006 | 3.47 | 3.71% |
2007 | 3.49 | 0.60% |
2008 | 3.37 | -3.41% |
2009 | 3.41 | 0.98% |
2010 | 3.51 | 3.08% |
2011 | 3.58 | 1.97% |
2012 | 3.57 | -0.17% |
2013 | 3.59 | 0.50% |
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